hurricanekatrina. >>we're looking for high risk cargo that comes into the country. >> reporter: ricardo shelter is port director of baltimore for customs and border patrol. this year the agency intercepted five insects never seen before in baltimore. some can be smaller than a grain of rice. >> you could have crops that are destroyed in the u.s. states. you could have interception of a pest or plant product that can make people sick. >> reporter: just look at what the brown march more mav -- marmalateed stink bug has done. the stink bug hit this farmer's orchard hard this year. >> the stink bug have already sucked some of the juice out of cells. >> reporter: he'll have to sell these apples for juice and get half the price he would for a good apple sold in stores. the problem with invasive pests like this is there are no natural predators here. so farmers have to spray to keep the crop damage down. that increases their cost, a cost which is passed on to you in the food you buy. >> how much does it cost me in money? gee, that's a million dollar question. >> reporter: the u.s. departme